The Qur'an is the only guide for all mankind,
and has never been altered since the
day it was first revealed.

Say: ‘What thing is greatest as a witness?’ Say: ‘Allah.
He is Witness between me and you. This Qur’an has been revealed
to me so that I may warn you by it, and anyone
else it reaches.
(Surat al-An’am: 19)

As we have already stated, many people seek love, peace, inner
certainty, friendship, mercy and kindness-things which only Allah
can give them-in things other than Allah, such as idea of karma.
These beliefs are, however, founded on superstition and error.
It is only Allah, our Creator, Who understands our inner nature
and knows how we can be made happy and contented. Therefore, the
best and most correct way for us to follow is the way shown to
us by Allah Himself. Allah has described the right way and the
right religion for us in the Qur'an, His most recent revelation.
This is what Allah says about the Qur'an:

That is the Book, without any doubt. It contains
guidance for those who guard against evil. (Surat al-Baqara: 2)

Allah revealed the Qu'ran to the Prophet Muhammad, may Allah
bless him and grant him peace, in order to make Himself known
to us, to tell us the purpose for which mankind, life in this
world and death were created, to tell us of the existence of the
afterlife, the end of the world and of the Day of Judgement, and
to tell us many essential pieces of knowledge-such as which good
qualities of character please Him. Allah revealed Himself to other
prophets before He revealed the Qur'an, but all the previous divinely-revealed
books have, in time, become partially corrupted. The Qur'an, however,
is the most recent divine revelation and has never been corrupted.
Allah tells us that the Qur'an will be protected, and will not
suffer corruption, in the following verse:

It is We Who have sent down the Reminder and
We Who will preserve it. (Surat al-Hijr: 9)

The faithful are absolutely confident in the knowledge that the
Qur'an is the very word of Allah and is the only guide for mankind.
There is a great deal of evidence for this. For instance, the
inimitable style in which it is written and the hidden meanings
it contains are clear evidence that it comes from Allah. Moreover,
there are many miracles in the Qur'an. For example, the Qur'an
tells us some scientific facts that were not known at the time
when it was revealed, around 1400 years ago, but were only "discovered"
in the twentieth century. (For further details, see Appendix,
"Miracles of the Qur'an".)

… Say: ‘Allah's guidance, that is true guidance. We are
commanded to submit as Muslims to the Lord of all the worlds.
(Surat al-An’am: 71)

Apart from these scientific facts, the Qur'an also contains information
about future events. Many more miracles of the Qur'an took place
when these events actually occurred during the course of history.
(For further details, see Appendix, "Miracles
of the Qur'an".)

Another of the outstanding features of the Qur'an is the fact
that it is entirely free from inconsistency. Throughout history,
enemies of Islam have approached the Qur'an with prejudiced minds,
and have spent great efforts in order to find something that was,
according to their own shallow logic, inconsistent. But the Qur'an,
being the word of Allah, does not contain any inconsistency whatsoever.
Allah tells us of this characteristic of the Qur'an in the following
verse:

Will they not ponder the Qur'an? If it had been
from other than Allah, they would have found many inconsistencies
in it. (Surat an-Nisa: 82)

The Qur'an is a guide that helps us to distinguish
truth from falsehood

There are many ideas, philosophies and beliefs current in the
world. Several of these are based on superstitious and dangerous
beliefs, ideas and practices, though they also have some positive
features. The concept of karma, for instance, contains several
erroneous and superstitious elements. It is true that there are
some things about it that might encourage people to live a morally
good life. However, the only way to distinguish what is truly
good from what is truly evil is to consult the Qu'ran and the
Sunnah of the Messenger, may Allah bless him and grant him peace,
which Allah sent to us as our only guide. During the course of
this book, we have described some of the characteristics of the
idea of karma, and have explained why various aspects of this
idea are true or false. In doing this, our only criterion and
source of reference has been the verses of the Qur'an. For instance,
when criticising the belief in reincarnation which forms part
of karmic philosophy, we were guided by the verses of the Qur'an.
The reason for this is that all sources apart from Allah's Book
and the Sunnah of Muhammad, may Allah bless him and grant him
peace, are products of human thought, so they cannot be absolutely
reliable. The only absolutely reliable source is Allah's own Book
and His Messenger's Sunnah. Those who delude themselves that they
can live their lives according to any other book or source cannot
avoid error.

Allah tells us of the Quran's ability to distinguish truth from
falsehood in the following verse:

… and He has sent down the Furqan (The standard
by which to discern the true from the false). Those who reject
Allah's Signs will have a terrible punishment. Allah is Almighty,
Exactor of Revenge. (Surah Al 'Imran: 4)

The Qur'an is the only Book that shows mankind the way to liberation,
that gives us warnings about our eternal life after death, that
indicates the right road and that is capable of being a guide
for those who want to obtain Allah's grace and mercy, and to reach
Allah's Garden. And the religion of Islam, as communicated to
us in the Qur'an, is the sole religion chosen by Allah for mankind
in this age. Allah tells us about this in the following verse:

If anyone desires anything other than Islam as a
religion, it will not be accepted from him, and in the hereafter
he will be among the losers. (Surah Al 'Imran: 85)

..."If the Book had been
sent down to us, We would have been better guided than they were."
For a Clear Sign has come to you from your Lord and guidance and
mercy...
(Surat al-An'am: 157)

In several eastern religions, as in the concept of karma and
other beliefs of this kind, there are obviously some features
borrowed or inherited from the true religions of the very ancient
peoples. However, in the course of time, these beliefs have become
corrupted owing to the addition of elements of superstition and
myth handed down from generation to generation. While they may
appeal to people to adopt positive moral qualities and to live
in peace, they also contain many irrational elements such as the
worship of cows, greeting them as if they were people, and regarding
mice and monkeys as sacred. That is why everyone who wishes to
bring positive qualities such as peace, love, friendship and inner
contentment into their lives, and who sincerely wishes to ensure
that these qualities become more widespread among mankind in general,
should look to Allah and to the Qur'an, the book that Allah revealed
to us and chose for us as our guide. It is only in the Qur'an
that we will find the solution to every problem that causes us
worry and that we wish to set right. Allah has created every one
of us in such a way that we will find happiness and peace of mind
if we follow the religion He Himself chose for us:

So set your face firmly towards the religion, as
a pure natural believer, Allah's natural pattern on which He made
mankind. There is no changing Allah's creation. That is the true
religion- but most people do not know it. (Surat ar-Rum: 30)